The LL-37 Masterclass | A Research Guide (2026)

<p>LL-37 is the peptide I think everyone should have on hand and almost nobody should be taking every day.</p><p>It&#39;s the only cathelicidin in the human body. That&#39;s an antimicrobial peptide your immune system makes to punch holes in bacteria, break up biofilms, and neutralize endotoxins. In this masterclass I walk through how it works. I cover why your vitamin D level decides whether your body can even make it. Then the specific situations where I reach for it. Stubborn sinus infections, bacterial acne, gut biofilms, suspected mold, and high-exposure travel windows.</p><p>I also cover who needs to stay away from it. Active autoimmune flares, rosacea, certain cancers, and mast cell issues can all go the wrong direction with LL-37.</p><p>Then dosing. I break down why I use 100 to 150mcg instead of the 2mg some people push. I go over how long a cycle should run and why maintenance dosing makes no sense. And I show how I sequence it with Thymosin Alpha 1, BPC-157, and TB-500.</p><p>One honest note. Almost all of the LL-37 data is preclinical or anecdotal. The only human trial is topical, and the lower doses beat the higher ones.</p><p>If you&#39;ve ever wondered whether LL-37 belongs in your protocol, this one answers it.</p><p><br></p><p>For research and entertainment purposes only. Subscribe for more peptide research and analysis.<br></p><p>👇 ALL MY LINKS IN ONE PLACE<br><a href="https://hunterwilliamshealth.com/links" target="_blank" rel="ugc noopener noreferrer">https://hunterwilliamshealth.com/links</a></p>